Driver side light was out, and the lens was broken. I figured do the LED upgrade. Passenger side went in and lit up perfectly, driver side no light. Switched the two LEDs and passenger side lit up again. I got out the tester I got power to the gray wire, none to the brown, I assume the brown must be a ground, I guess it is no good. Can I splice in a wire and ground it to the nearest bolt. Both LEDs work on the passenger side.